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Deep eutectic solvent inclusions for high- composite dielectric elastomers

《化学科学与工程前沿（英文）》 2022年第16卷第6期页码 996-1002 doi: 10.1007/s11705-022-2138-2

摘要： Recent advances in novel electroactive devices have placed new requirements on material development. High-performance dielectric elastomers with good mechanical stretchability and high dielectric constant are under high demand. However, the current strategy for fabricating these materials suffers from high cost or low thermal stability, which greatly hinders large-scale industrial production. Herein, we have successfully developed a novel strategy for improving the dielectric constant of polymeric elastomers via deep eutectic solvent inclusion by taking advantage of the low cost, convenient and environmentally benign synthesis process and high ionic conductivity from deep eutectic solvents. The as-prepared composite elastomers showed good stretchability and a greatly enhanced dielectric constant with a negligible increase in dielectric dissipation. Moreover, we have proven the universality of our strategy by using different types of deep eutectic solvents. It is believed that low-cost, easy-synthesis and environmentally friendly deep eutectic solvents including composite elastomers are highly suitable for large-scale industrial production and can greatly broaden the application fields of dielectric elastomers.

关键词： composite materials deep eutectic solvent dielectric elastomer high dielectric constant

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The Rion-Antirion bridge—when a dream becomes reality

Jacques COMBAULT

《结构与土木工程前沿（英文）》 2011年第5卷第4期页码 415-426 doi: 10.1007/s11709-011-0130-x

摘要： Opened to traffic in August 2004, the Rion-Antirion Bridge crosses the Gulf of Corinth near Patras in western Greece. It consists of an impressive multi cable-stayed span bridge connected to the land by two approaches. An exceptional combination of physical conditions made this project quite unusual: high water depth, deep strata of weak soil, strong seismic activity and fault displacements. In addition a risk of heavy ship collision had to be taken into account. The structure has been designed in view of challenging severe earthquakes and ensuring the everyday serviceability of the link as well. To make the bridge feasible, innovative techniques had to be developed: The strength of the in situ soil has been improved by means of inclusions; the bridge deck has been suspended on its full length, and therefore isolated as much as it can be.

关键词： bridge multi cable-stayed spans soil reinforcement inclusions yield theory capacity design push-over dry dock wet dock

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俄罗斯雅库特乌达奇纳亚矿区含金刚石橄榄岩中的金刚石、石榴石和橄榄石中碳氢化合物的组成 Article

Nikolay V. Sobolev, Anatoly A. Tomilenko, Taras A. Bul´bak, Alla M. Logvinova

《工程（英文）》 2019年第5卷第3期页码 471-478 doi: 10.1016/j.eng.2019.03.002

摘要：

利用Focus GS-DSQ II系列单四极杆质谱仪（Thermo Scientific, USA）对俄罗斯雅库特乌达奇纳亚金伯利岩管中两种极稀有的含金刚石的橄榄岩捕虏体中的金刚石、伴生石榴石（镁铝榴石）和橄榄石中的挥发物进行了气相色谱-质谱（GC-MS）分析。这些捕虏体根据共生矿物组成不同可分为石榴石二辉橄榄岩和石榴石纯橄岩。与含有中等钙组分含量（约15%，摩尔分数）的石榴石二辉橄榄岩不同，纯橄岩含有低钙组分含量（小于10%，摩尔分数）的亚钙铬石榴石。金刚石、石榴石和橄榄石中均含有主要的碳氢化合物及其衍生物，如脂肪族（烷烃、烯烃）、环类（环烷烃、芳烃）、含氧碳氢化合物（醇类、醚类）和杂环类（二噁烷、呋喃类）碳氢化合物，硝化、氯化和磺化化合物，二氧化碳和水。其中，金刚石的碳氢化合物总含量（相对百分比）为79.7%，石榴石的碳氢化合物总含量为69.1%，橄榄石的碳氢化合物总含量为92.6%，总碳氢化合物含量为161%~206%。关于金刚石、伴生石榴石和橄榄石中挥发物的最新数据表明，在某些上地幔区域，存在大量的碳氢化合物以及氮气、二氧化碳和水。

关键词：金刚石挥发物碳氢化合物石榴石橄榄石包裹体